|Born||March 12, 1908
|Died||July 21, 1949
|Alma mater||Leipzig University|
Karl–Hermann Geib (March 12, 1908 – July 21, 1949) was a German physical chemist who, in 1943, developed the "dual temperature exchange sulphide process" (known as the Girdler sulfide process) which is regarded as the "most cost-effective process for producing heavy water". A parallel development of this process was achieved by Jerome S. Spevack at Columbia University and became the basis of post-World War II production of heavy water in the United States at the only remaining facilities located at Wabash River Ordnance Works, near Dana and Newport, Indiana, and the Savannah River Site.
Geib was born in Berlin, Germany, on March 12, 1908 to Karl Geib and his wife Maria (née Buddee). He married Hedwig Delbrück and they had four children, Katharina, born 1937, Barbara, born1938, Ruprecht, born 1939 and Ulrike Heise, born 1940.
In 1931, he graduated from Leipzig University and joined the Institute of Physical Chemistry and Electrochemistry of Kaiser Wilhelm Society, which is known today as the Fritz Haber Institute of the Max Planck Society.
In 1931, while under the supervision of Paul Harteck, in Berlin, Geib delivered his dissertation on The Action of Atomic to Molecular Hydrogen  and joined the Kaiser-Wilhelm Institut für physikalische Chemie und Elektrochemie of the Kaiser-Wilhelm Gesellschaft in Berlin-Dahlem. The first scientific work he performed under the direction of Paul Harteck. Shortly after Hartek highway crossing in Cambridge Geib returned to alma mater – the Leipzig University and married Hedwig Delbrück.
He began exploring the reactions of the newly opened deuterium. Independently and jointly with V. T. Forster, E. W. R. Steacie, A. Lendl, R. K. F. Bonhoeffer and L. D. C. Bok he published a number of papers, the results of which are reflected in his review.
After the beginning of World War II (1940), Geib went to the chemical industrial complexes Leunawerke and proceeded under the Hartek's direction of the development process production of heavy water by a two-temperature isotopic exchange between hydrogen sulfide and water. So he received reservation on the mobilization, which for him was a significant factor. Karl and Hedwig Geib at the time had four children from infancy to five years: Katharina Oestreich (1937), Barbara Geib-Pietsch (1937), Ruprecht Geib (1939) and Ulrike Heise (1939).
In 1943, the Norwegian heavy water sabotage caused the production of heavy water to be returned to Germany under the direction of Paul Harteck, whose graduate student, Karl-Hermann Geib, while employed with the German chemical industry conglomerate IG Farben, suggested an exchange that used hydrogen sulfide in the process.
The developed process was more effective than process with exchange in a hydrogen-water system, but its implementation was delayed. To create production capacity due to corrosion of hydrogen sulfide would take a lot of special alloys, which in time of war there is a shortage. Simultaneously developed by Jerome Spevak in the U.S. (1943) the same process did not develop at first for the same reason. Immediately after the war under the auspices of the Soviet Military Administration in Germany and other agencies in the Leunawerke had assembled a group of experts, led by Paul Herold, a former Director on science. Geib joined the group. Pilot plants were restored and study of the process by isotopic exchange between hydrogen and water was continued. Besides the preliminary draft of plant with hydrogen sulfide annual capacity 5 tons of heavy water was designed.
Deportation to Soviet Union
At 4:15 a.m. on October 21, 1946, Geib, and all of the other German scientists who had worked on heavy water production during World War II, were rounded up in Leunawerke by the NKVD in operation "Osoaviakhim" as part of the Russian Alsos and deported to the Soviet Union. They were housed in Babushkin (town) near Moscow and put to work at the Karpov Institute of Physical Chemistry under the leadership of Max Volmer until mid-1948 when they were then sent to Rubizhne in the Ukraine.
Scientific work on heavy water and its production in both Nazi Germany and the Soviet Union were conducted in strict secrecy, so many facts remain unclear.
After applying to the Canadian Embassy in Moscow for asylum (exact date classified) giving the name of Professor E. W. R. Steacie as a reference, he was told to come back the next day. That was the last time he was seen and his wife in Germany received his effects in the mail.
- Per F Dahl (1 January 1999). Heavy Water and the Wartime Race for Nuclear Energy. CRC Press. pp. 298–. ISBN 978-0-7503-0633-1. Retrieved March 24, 2016.
- Lutz Castell; Otfried Ischebeck (April 17, 2013). Time, Quantum and Information. Springer Science & Business Media. pp. 37–. ISBN 978-3-662-10557-3. Retrieved March 24, 2016.
- Castell, Lutz (2003). Time, Quantum and Information. Google Books: Springer Science+Business Media. p. 37. ISBN 978-3-642-07892-7.
- Pietsch, Barbara; Sadovsky, A.S. (May 2015). Heavywater. History of One Priority. Part 3. (PDF) (Report). J11505. Karpov Institute of Physical Chemistry. ISSN 2227-6920. Retrieved March 21, 2016 – via International periodic scientific journal (SWorld).
- Geib, Karl-Hermann (1931). "Die Einwirkung von atomarem auf molekularen Wasserstoff". Zeitschrift für Physikalische Chemie Bodenstein-Festband. University of Hamburg: 849–862. Retrieved March 11, 2016.
- Mark Walker (January 1993). German National Socialism and the Quest for Nuclear Power, 1939-49. Cambridge University Press. pp. 142–. ISBN 978-0-521-43804-9. Retrieved March 24, 2016.
- Geib K. H. (1938). "Chemische Reaktionen der schweren Wasserstoffatome". Z. Elektrochem. 44 (№ 1): 81–88.
- Walker, Mark (January 1993). German National Socialism and the Quest for Nuclear Power, 1939–49. Google Books: Cambridge University Press. p. 142. ISBN 978-0-521-43804-9.
- A.S. Sadovsky : Heavy Water. History of one priority:Part I https://web.archive.org/web/20141111234744/http://www.sci-journal.ru/articles/2011/030e.pdf
- F. A. Valente (March 21, 1955). Section 73 (Atomic Energy) NIS 26 (USSR) (PDF) (Report). Central Intelligence Agency. pp. H15–H16. Retrieved March 9, 2016.
- Oleynikov, Pavel V. (2000). German Scientists in the Soviet Atomic Project (PDF) (Report). The Nonproliferation Review. Retrieved March 12, 2016.
- Waltham, Chris (August 1998). An Early History of Heavy Water (PDF) (Report). University of British Columbia. Retrieved March 18, 2016.